ResponsibilitiesDirector of the World Radiation Monitoring Center (WRMC) of the Baseline Surface Radiation Network (BSRN); raporteur of the BSRN Working group of the International Radiation Commission; scientific leader of the meteorological observatories of the Antarctic station Neumayer and the research vessel Polarstern; member of the "SCAR Expert Group on Operational Meteorology in the Antarctic"; data curator of the Meteorological Information System MISAWI; Global Atmospheric Watch (GAW) contact person